PT-2026-53676 · Inovector · Mixpost

George Chen · Published 2026-06-29 · Updated 2026-06-29 · CVE-2026-57958

Mitre

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Mixpost through 2.6.0 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in authenticated users' browsers by crafting malicious OAuth callback URLs with unsanitized error query parameters. Attackers can exploit the OAuth callback controller's failure to sanitize error parameters before rendering them through Laravel flash messages via the Vue v-html directive to hijack authenticated user sessions or perform unauthorized actions.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-57958

Affected Products

Mixpost

References · 3

• 🔥 https://github.com/inovector/mixpost/issues/204 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-57958 · Security Note
• https://vulncheck.com/advisories/mixpost-reflected-xss-via-oauth-callback-error-parameter · Note